source: trunk/doc/src/examples/qtscripttetrix.qdoc@ 1168

/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation ([email protected])
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:FDL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in a
** written agreement between you and Nokia.
**
** GNU Free Documentation License
** Alternatively, this file may be used under the terms of the GNU Free
** Documentation License version 1.3 as published by the Free Software
** Foundation and appearing in the file included in the packaging of this
** file.
**
** If you have questions regarding the use of this file, please contact
** Nokia at [email protected].
** $QT_END_LICENSE$
**
****************************************************************************/

/*!
    \example script/qstetrix
    \title Qt Script Tetrix Example

    The QSTetrix example is a Qt Script version of the classic Tetrix game.

    \image tetrix-example.png

    \section1 Overview

    The program logic in this example is a fairly straight port of the
    logic in the C++ \l{Tetrix Example}. You may find it useful to compare
    the implementations of the \c TetrixBoard, \c TetrixPiece and
    \c TetrixWindow classes to see how Qt Script is used to implement
    methods, call Qt functions, and emit signals.

    \section1 Setting up the GUI

    The graphical user interface is defined in a UI file, created
    using Qt Designer, and is set up in the example's C++ \c{main.cpp} file.

    \snippet examples/script/qstetrix/main.cpp 0

    We define a custom UI loader that handles our \c TetrixBoard widget; this
    is the main component of the UI (where the pieces are drawn).

    \snippet examples/script/qstetrix/main.cpp 1

    We initialize the script engine to have the Qt namespace, so that
    e.g., \l{Qt::Key_Left}{Qt.Key_Left} will be available to script code.
    We also make the application object available (for the
    \l{QApplication::}{quit()} slot).

    \snippet examples/script/qstetrix/main.cpp 2

    Several scripts are evaluated as part of the engine setup process.
    The \c{tetrixpiece.js} file contains the definition of the \c TetrixPiece
    class, which is used to populate the play field. The \c{tetrixboard.js}
    file contains the definition of the \c TetrixBoard class, which contains
    the main game logic. Finally, \c{tetrixwindow.js} contains the definition
    of the \c TetrixWindow class, which wires up the top-level widget.

    \snippet examples/script/qstetrix/main.cpp 3

    A form is created from the UI file. A new \c TetrixWindow script object
    is then constructed, passing the form as its argument.

    \snippet examples/script/qstetrix/main.cpp 4

    The form is shown, and the event loop is entered.
*/